Готові списки джерел за темами / Missing mass (Astronomy)

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Добірка наукової літератури з теми "Missing mass (Astronomy)"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 31 січня 2023

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Статті в журналах з теми "Missing mass (Astronomy)"

Malkov, O. Yu. "Local missing mass." Astrophysics 37, no. 3 (July 1994): 256–60. http://dx.doi.org/10.1007/bf02058781.

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Visser, Matt. "Is the ?missing mass? really missing?" General Relativity and Gravitation 20, no. 1 (January 1988): 77–81. http://dx.doi.org/10.1007/bf00759258.

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Atkins, Chris. "The missing mass." Physics World 34, no. 10 (December 1, 2021): 25v. http://dx.doi.org/10.1088/2058-7058/34/10/32.

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In response to the Lateral Thoughts quiz “Sporting chance”, in which question 8 asked for a rough estimate of the theoretical maximum height a pole vaulter could jump, and why the actual world record is slightly above this.

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Petit, J. P. "The missing-mass problem." Il Nuovo Cimento B 109, no. 7 (July 1994): 697–709. http://dx.doi.org/10.1007/bf02722527.

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Krishan, V. "Rotation curves of galaxies: Missing mass or missing physics." Pramana 49, no. 1 (July 1997): 147–54. http://dx.doi.org/10.1007/bf02856345.

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Schatzman, E. "Missing mass or dark matter?" International Journal of Theoretical Physics 28, no. 9 (September 1989): 1169–71. http://dx.doi.org/10.1007/bf00670357.

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Surdin, M. "The Missing Mass of the Universe." Physics Essays 13, no. 1 (March 2000): 130–31. http://dx.doi.org/10.4006/1.3025419.

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Trippe, Sascha. "The ‘Missing Mass Problem’ in Astronomy and the Need for a Modified Law of Gravity." Zeitschrift für Naturforschung A 69, no. 3-4 (April 1, 2014): 173–87. http://dx.doi.org/10.5560/zna.2014-0003.

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Since the 1930s, astronomical observations have accumulated evidence that our understanding of the dynamics of galaxies and groups of galaxies is grossly incomplete: assuming the validity of Newton’s law of gravity on astronomical scales, the observed mass (stored in stars and interstellar gas) of stellar systems can account only for roughly 10% of the dynamical (gravitating) mass required to explain the high velocities of stars in those systems. The standard approach to this ‘missing mass problem’ has been the postulate of ‘dark matter’, meaning an additional, electromagnetically dark, matter component that provides the missing mass. However, direct observational evidence for dark matter has not been found to date. More importantly, astronomical observations obtained during the last decade indicate that dark matter cannot explain the kinematics of galaxies. Multiple observations show that the discrepancy between observed and dynamical mass is a function of gravitational acceleration (or field strength) but not of other parameters (size, rotation speed, etc.) of a galaxy; the mass discrepancy appears below a characteristic and universal acceleration aM = (1:1±0:1) · 10-10 ms-2 (Milgrom’s constant). Consequently, the idea of a modified law of gravity, specifically the ansatz of modified Newtonian dynamics (MOND), is becoming increasingly important in astrophysics. MOND has successfully predicted various important empirical relations of galaxy dynamics, including the famous Tully-Fisher and Faber-Jackson relations. MOND is found to be consistent with stellar dynamics from binary stars to clusters of galaxies, thus covering stellar systems spanning eight orders of magnitude in size and 14 orders of magnitude in mass. These developments have the potential to initiate a paradigm shift from dark matter to a modified law of gravity as the physical mechanism behind the missing mass problem.

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Gorjup, Niko, and Amrit Sorli. "SMBH relativistic mass and missing dark matter." Advanced Studies in Theoretical Physics 16, no. 4 (2022): 291–97. http://dx.doi.org/10.12988/astp.2022.91963.

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Cook, Richard I., and I. P. Dell'Antonio. "THE MISSING WEAK LENSING MASS IN A781." Astrophysical Journal 750, no. 2 (April 25, 2012): 153. http://dx.doi.org/10.1088/0004-637x/750/2/153.

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Дисертації з теми "Missing mass (Astronomy)"

Ng, Shao-Chin Cindy. "Cosmological models with quintessence : dynamical properties and observational constraints." Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phn5758.pdf.

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Bibliography: leaves 100-106. Studies different models of "quintessence", in particular, a quintessence arising from an ultra-light pseudo Nambu-Goldstone boson. Overviews dynamical properties for these models using phase-space analyses to study attractor and tracker solutions. Studies high-redshift type Ia supernovae constraints on these models. Studies the impact of a simple phenomenological model for supernovae luminosity evolution on the PNGB models and the potentials of a future supernovae data set to discriminate the PNGB models over the other quintessence models. Studies gravitational lensing statistics of high luminosity quasars upon the quintessence models.

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Bebronne, Michael. "Theoretical and phenomenological aspects of theories with massive gravitons." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210253.

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Depuis sa formulation au début du 20ème siècle, la théorie de la Relativité Générale a été vérifiée avec une précision sans cesse croissante. Cette théorie prédit, entre autre, l'existence d'ondes gravitationnelles qui restent à ce jour inobservées, et ce malgré de nombreuses tentatives de détections. Ces ondes sont caractérisées par leur absence de masse. Une des questions qui se pose alors est de savoir si cette absence de masse est une condition nécessaire pour que théorie et observations concordent. Pour répondre à cette question, il est indispensable d'étudier les différents aspects des théories décrivant des ondes gravitationnelles massives. Au-delà de cet intérêt purement théorique, l'étude de ces théories est, entre autre, motivée par de récentes observations cosmologiques. Celles-ci indiquent que l'accord entre la Relativité Générale et les observations n'est possible que si on suppose l'existence de matière et d'énergie noires.

Cette thèse est dédiée à une classe de théories décrivant des ondes gravitationnelles massives. Dans un premier temps, nous résumons les différents problèmes qui surgissent lorsqu'on tente de donner une masse aux ondes gravitationnelles. Ensuite, nous introduisons une classe de modèles et étudions certaines de leurs caractéristiques.

Le premier aspect étudié concerne l'existence d'une interaction de type instantanée. De telles interactions sont possibles étant donné que l'invariance de Lorentz est spontanément brisée dans les modèles considérés. Celles-ci sont dès lors discutées et un exemple concret est fourni.

La présence d'une interaction instantanée dans ces modèles a une conséquence directe sur les solutions "trous noirs" des équations du champ. En effet, on s'attend à ce que l'interaction instantanée puisse propager de l'information à l'extérieur d'un trou noir, ce qui entraînerait une modification de ces solutions par rapport à celles de la Relativité Générale. Cette supposition est confirmée par les solutions "trous noirs" obtenues dans cette thèse. Celles-ci peuvent soit imiter une certaine quantité de matière noire, soit conduire à un champ gravitationnel répulsif.

Finalement, les mécanismes de formation des grandes structures de l'Univers (galaxies, amas de galaxies, ) sont étudiés pour les théories considérées. Cette dernière discussion démontre que ces modèles reproduisent le comportement prévu par la Relativité Générale et sont, par conséquent, en accord avec les observations.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Capela, Fabio. "Black holes and the dark sector." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209310.

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This thesis is divided in two parts: the first part is dedicated to the study of black hole solutions in a theory of modified gravity, called massive gravity, that may be able to explain the actual stage of accelerated expansion of the Universe, while in the second part we focus on constraining primordial black holes as dark matter candidates.

In particular, during the first part we study the thermodynamical properties of specific black hole solutions in massive gravity. We conclude that such black hole solutions do not follow the second and third of law of thermodynamics, which may signal a problem in the model. For instance, a naked singularity may be created as a result of the evolution of a singularity-free state.

In the second part, we constrain primordial black holes as dark matter candidates. To do that, we consider the effect of primordial black holes when they interact with compact objects, such as neutron stars and white dwarfs. The idea is as follows: if a primordial black hole is captured by a compact object, then the accretion of the neutron star or white dwarf’s material into the hole is so fast that the black hole destroys the star in a very short time. Therefore, observations of long-lived compact objects impose constraints on the fraction of primordial black holes. Considering both direct capture and capture through star formation of primordial black holes by compact objects, we are able to rule out primordial black holes as the main component of dark matter under certain assumptions that are discussed.

To better understand the relevance of these subjects in modern cosmology, we begin the thesis by introducing the standard model of cosmology and its problems. We give particular emphasis to modifications of gravity, such as massive gravity, and black holes in our discussion of the dark sector of the Universe./

Cette thèse est divisée en deux parties :la première partie est consacrée à l’étude de certaines solutions de trous noirs dans une théorie modifiée de la gravité, appelée la gravité massive, qui peut être en mesure d’expliquer l’expansion accélérée de l’Univers; tandis que dans la seconde partie, nous nous concentrons sur des contraintes sur les trous noirs primordiaux comme candidats de matière noire.

En particulier, au cours de la première partie, nous étudions les propriétés thermodynamiques de solutions spécifiques de trous noirs en gravité massive. Nous en concluons que ces solutions de trous noirs ne suivent ni la deuxième, ni la troisième loi de la thermodynamique, ce qui semble indiquer une inconsistance dans le modèle. Par exemple, une singularité nue peut être créée à la suite de l’évolution d’un état sans aucune singularité.

Dans la deuxième partie, nous mettons des contraintes sur les trous noirs primordiaux en tant que candidats de matière noire. Pour ce faire, nous considérons l’effet des trous noirs primordiaux lorsqu’ils interagissent avec des objets compacts, tels que les étoiles à neutrons et les naines blanches. L’idée est comme suit :si un trou noir primordial est capturé par un objet compact, alors l’accrétion du matériel constituant l’étoile à neutrons ou la naine blanche est si rapide que le trou noir détruit l’étoile en un temps très court. Par conséquent, les observations d’objets compacts imposent des contraintes sur la fraction de trous noirs primordiaux. Considérant à la fois la capture directe des trous noirs primordiaux par les objets compacts et la capture au travers de la formation stellaire, nous sommes en mesure d’exclure les trous noirs primordiaux comme la composante principale de matière noire sous certaines hypothèses qui sont discutées.

Pour mieux comprendre la pertinence de ces sujets dans la cosmologie moderne, nous commençons la thèse par l’introduction du modèle standard de la cosmologie et de ses problèmes. Nous donnons une importance particulière aux modifications de la gravité, telles que la gravité massive, et aux trous noirs dans notre discussion sur le secteur sombre de l’Univers.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Ng, Shao-Chin Cindy. "Cosmological models with quintessence : dynamical properties and observational constraints / Shao-Chin Cindy Ng." Thesis, 2001. http://hdl.handle.net/2440/21740.

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Bibliography: leaves 100-106.
v, 107 leaves : ill. ; 30 cm.
Studies different models of "quintessence", in particular, a quintessence arising from an ultra-light pseudo Nambu-Goldstone boson. Overviews dynamical properties for these models using phase-space analyses to study attractor and tracker solutions. Studies high-redshift type Ia supernovae constraints on these models. Studies the impact of a simple phenomenological model for supernovae luminosity evolution on the PNGB models and the potentials of a future supernovae data set to discriminate the PNGB models over the other quintessence models. Studies gravitational lensing statistics of high luminosity quasars upon the quintessence models.
Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 2001

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Schmidt, Ralph [Verfasser]. "Automatische Bestimmung von Verknüpfungspunkten für HRSC-Bilder der Mars Express-Mission / von Ralph Schmidt." 2008. http://d-nb.info/991013719/34.

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Pauly, Kristian [Verfasser]. "In situ consumable production for Mars missions / Kristian Pauly." 2002. http://d-nb.info/967531640/34.

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Книги з теми "Missing mass (Astronomy)"

Mass and matter. Mankato, MN: Creative Education, 2012.

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Krauss, Lawrence Maxwell. Quintessence: The mystery of missing mass in the universe. New York: Basic Books, 2000.

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Tucker, Wallace H. The dark matter: Contemporary science's quest for the mass hidden in our universe. New York: Morrow, 1988.

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Hawkins, Michael. Hunting down the universe: The missing mass, primordial black holes, and other dark matters. Reading, Mass: Addison-Wesley, 1997.

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Michael, Hawkins. Hunting down the universe: The missing mass, primordial black holes, and other dark matters. London: Little, Brown, 1997.

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Celia, Fitzgerald, ed. Hunting down the universe: The missing mass, primordial black holes, and other dark matters. Reading, Mass: Perseus Books, 1998.

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Gribbin, John R. The Omega Point: The search for the missing mass and the ultimate fate of the universe. Toronto: Bantam Books, 1988.

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Gribbin, John R. The Omega Point: The search for the missing mass and the ultimate fate of the universe. London: Heinemann, 1987.

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Papantonopoulos, E. The invisible universe: Dark matter and dark energy. [New York]: Springer-Verlag Berlin Heidelberg, 2010.

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The hidden universe. New York: E. Horwood, 1991.

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Частини книг з теми "Missing mass (Astronomy)"

Rothenflug, R., and M. Arnaud. "Galaxy Clusters: The Missing Mass in Stars." In X-Ray Astronomy in the Exosat Era, 689–92. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5448-9_96.

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Тези доповідей конференцій з теми "Missing mass (Astronomy)"

Rouverand, Léa, Cerise Cuny, Elena López-Contreras González, Marine Prunier, Mathéo Fouchet, Nicolas Wattelle, Valentine Bourgeois, Quentin Royer, and Marie Delaroche. "Experiment collaboration program during a Martian analogue mission to introduce young students to human space exploration." In Symposium on Space Educational Activities (SSAE). Universitat Politècnica de Catalunya, 2022. http://dx.doi.org/10.5821/conference-9788419184405.090.

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The last decade has demonstrated an increased public and private interest towards crewed missions through the emergence of New Space and the Artemis program. There is therefore a need to form the next generation of scientists to prepare future crewed space exploration missions. In this context, it is important to familiarize teenagers with the scientific issues of today’s world and to inspire them to engage in the space sector. Crew 263 is a group of seven students preparing a Martian analogue mission at the Mars Desert Research Station (MDRS) in the desert of Utah (United States). A Martian analogue mission at the MDRS, because is the perfect set-up to introduce young students to human space exploration. In the context of their mission, Crew 263 has organized a program of space educational activities for middle and high school students surrounding the topics of altered gravity, astronomy, health and safety procedures and robotic systems. Precisely, a set of four experiments that will be performed by the students was conceived to bring into light the various scientific topics surrounding space exploration missions. The experiment “Plants in Microgravity” aims to illustrate the influence of gravity on plant growth by planting seeds in pots mounted on a rotating platform in a vertical plane, which will disturb their gravitational cues. “Beginner Astronomer” aims to introduce students to astronomy and astrophotography by establishing with the students a list of galaxies/nebulas to be observed during the Mission. Then, for “Emergency situation at the MDRS” students will put into practice the scientific approach by creating protocols to mitigate risk situations during space exploration missions. Finally, for the “Perseverance’s little brother” experiment, students will develop a small rover to analyze the atmosphere condition around the MDRS station. To maximize their involvement, prior to the mission at the MDRS, the middle and high school students prepare the experiments with the support of the crew. Then, the prepared experiment will be performed in parallel with the crew while they are simulating Martian life. To allow students to be immersed in the mission when the crew will be at the MDRS, short podcasts will be recorded describing the crew’s daily life and the evolution of the different experiments. This podcast will be sent to the classes during the simulation, thus allowing the students to have an insight on the daily life of the analogue astronauts at the station.

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Cherepashchuk, A. M., T. S. Khruzina, and A. I. Bogomazov. "Parameters of Sco X-1." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.039.

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We modelled optical light curves of Sco X-1 obtained by the Kepler K2 mission. We calculated the ratio of the mass of therelativistic object to the mass of the optical star q = M x /M v = 3.6 (3.5 − 3.8) and the orbital inclination i = 30 ◦ (25 ◦ − 34 ◦ ).

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Fleming, Brian T., Kevin C. France, Nicholas Nell, Richard A. Kohnert, Keri Hoadley, Pascal M. Petit, Aline A. Vidotto, et al. "The Colorado Ultraviolet Transit Experiment (CUTE): a dedicated cubesat mission for the study of exoplanetary mass loss and magnetic fields." In UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, edited by Oswald H. Siegmund. SPIE, 2017. http://dx.doi.org/10.1117/12.2276138.

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Ueta, Toshiya, Hideyuki Izumiura, Issei Yamamura, Osamu Hashimoto, Mikako Matsuura, Takashi Miyata, Yoshikazu Nakada, et al. "Excavating Mass Loss History in Extended Dust Shells of Evolved Stars: the MLHES Mission Programme with the AKARI Astronomy Satellite." In UNSOLVED PROBLEMS IN STELLAR PHYSICS: A Conference in Honor of Douglas Gough. AIP, 2007. http://dx.doi.org/10.1063/1.2818995.

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